[ovirt-devel] "Host.queryVms": A proposal for new a VDSM API verb

[Vinzenz Feenstra]

On 07/22/2014 02:00 PM, Francesco Romani wrote:
> ----- Original Message -----
>> From: "Vinzenz Feenstra" <vfeenstr at redhat.com>
>> To: devel at ovirt.org
>> Sent: Tuesday, July 22, 2014 11:29:40 AM
>> Subject: Re: [ovirt-devel] "Host.queryVms": A proposal for new a VDSM API verb
>>
>> On 07/14/2014 04:05 PM, Vinzenz Feenstra wrote:
>>> Hi,
>> Since this mail did not receive enough attention I am bumping it again.
>>
>> For this proposal exists currently a draft patch
>> http://gerrit.ovirt.org/#/c/28819/
>> The patch is not final since the query function should not require to
>> update all the data
>> on every call. (This should be done directly by data modifying code.
>> However that would be implemented by follow up patches)
>>
>> The trackable.py implementation also can be easily extended in future
>> for enabling push notifications to the engine once
>> we switched to the new communication. This could be done by subscribing
>> to certain keys in the TrackableMapping instance.
>> (Not implemented yet)
> Nice! Both nice to have now and on top of json/push notifications tomorrow.
> I just had a quick look to the changes to vm.py and to the interface
> and looks nice as well.
>
> [...]
>>> I have executed some tests and in those tested scenarios the new Verb
>>> can result in an improvement of 75%-90% of data transferred and average
>>> response body size depending on the scenario and usage.
>>>
>>> The test results can be found here:
>>> http://www.ovirt.org/Feature/VDSM_VM_Query_API/Measurements#Results
>>> (An explanation of the tested methods is on the top of the page and a
>>> description of the scenario in each section)
> Nice graphs :)
> Silly comment: having units in 'bytes' on the X-axis makes the numbers somehow
> hard to parse (to me). I suggest you to convert them to KiB for better readability.
> The savings look really nice.
The table below shows it in MiB in a separate column
>
> Bests,
>


-- 
Regards,

Vinzenz Feenstra | Senior Software Engineer
RedHat Engineering Virtualization R & D
Phone: +420 532 294 625
IRC: vfeenstr or evilissimo

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